Quartz / Quartzite
Silicon Dioxide (SiO2)
mineral / metamorphic
Category
Mineral And Metamorphic Rock
Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.
Marble
Recrystallized Calcite Rock (CaCO3)
metamorphic
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Granite Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Greenschist with Quartz Veining
Greenschist (commonly containing Chlorite, Actinolite, and Epidote)
metamorphic
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Yellow Agate
Silicon Dioxide (SiO2)
mineral
Smoky Quartz Cluster
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-Stained or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (with possible Garnet inclusions)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Smoky variety on matrix)
Silicon Dioxide (SiO2)
mineral
Massive Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Schist
Crystalline Schist (often containing Muscovite, Biotte, or Quartz)
metamorphic
Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Slate
Slate (Metamorphic Rock)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with inclusions)
metamorphic
Granite Gneiss with Garnet
Garnetiferous Gneiss
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ruby in Matrix
Corundum (Al2O3)
mineral
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Mineral in Igneous/Sedimentary host
Greenschist (containing Epidote and Quartz)
Greenschist (Epidote-Chlorite-Actinolite Schist)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Mineral
Quartz
Quartz (SiO2)
Mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral